Spiral wound pipe rehabilitation equipment

Main Functions

1. Repairing Damaged Pipes

Remedies issues such as:

Cracks

Joint misalignment

Leakage

Corrosion

Aging/Deterioration

2. Creating a New Structural Pipe

Forms a:

Continuous PVC pipe

Structural liner

Fully structural pipe

Enables the following, depending on design:

Semi-structural repair

Fully-structural repair

Complies with relevant standards for mechanical winding installation.

3. Enhancing Load-Bearing Capacity

The newly formed PVC structural pipe withstands:

Earth pressure

Surface traffic loads

Groundwater pressure

Long-term operational loads

Service life typically exceeds 50 years depending on design and operating conditions.

4. Improving Flow Capacity

The PVC inner wall is:

Smooth

Low-friction

Resistant to scaling/encrustation

Actual flow capacity is often maintained or improved, even with a slight reduction in pipe diameter.

5. Eliminating the Need for Large-Scale Excavation

Installation utilizes:

Manholes

Access shafts

...to complete the repair.

6. Installation with Live Flow Selected Conditions

Certain mechanical winding systems allow for:

Live flow installation

No flow interruption

Reduces or eliminates the need for large-scale flow diversion.

| Equipment Name             | Function                  |

| -------------------------- | ------------------------- |

| Spiral Winding Machine     | Spiral Winding Unit       |

| Hydraulic Power Unit       | Hydraulic Power Station   |

| PLC Control System         | PLC Intelligent Control System |

| Cable Winch                | Traction System           |

| PVC Profile Feeding System | Profile Feeding System    |

| Profile Coil Stand         | Profile Uncoiling Stand   |

| Profile Guide Device       | Guiding Device            |

| Joint Locking System       | Joint Locking Mechanism   |

| Grouting System Optional | Grouting System           |

| CCTV Inspection Camera     | Pipeline Inspection System|

| Generator Optional       | Power Generation System   |

Working Principle

Step 1

Feed the continuous PVC profile into the equipment.

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Step 2

The equipment continuously advances the profile using rollers.

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Step 3The profile is spirally wound according to the set pitch.

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Step 4

Adjacent interlocking mechanisms automatically engage.

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Step 5

A continuous PVC liner pipe is gradually formed.

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Step 6

Depending on the method:

Non-grouted Close Fit

The PVC fits tightly against the existing pipe.

Grouted

After forming the new pipe with a fixed diameter, a highly fluid cement-based grout is injected into the annular space between the existing pipe and the new pipe to secure the liner and restore structural integrity.

Construction Process

CCTV Inspection

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Pipeline Cleaning

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Removal of Local Obstructions

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Equipment Lowering into Manhole

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PVC Profile Feeding

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Mechanical Spiral Winding

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Formation of Continuous New Pipe

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(Optional) Annular Grouting

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Manhole Connection Treatment

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Robotic Lateral Reinstatement

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CCTV Acceptance Inspection

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Commissioning

Applicable Existing Pipes

Suitable for rehabilitating:

Reinforced Concrete Pipe RCP

Concrete Pipe

Clay Pipe

Brick Sewer

Cast Iron Pipe

Steel Pipe

HDPE Pipe

PVC Pipe

GRP Pipe

Corrugated Pipe

Key Application Sectors

Widely used in:

Municipal Sewer

Stormwater Drainage

Combined Sewer

Industrial Pipelines

Chemical Pipelines

Culverts

Irrigation Canals

Airport Drainage

Highway Drainage

Railway Drainage

Port Drainage

Mining Drainage

Power Plant Pipelines

Common Technology Types

1. Mechanical Spiral Wound

Continuous PVC profile

Mechanical interlocking

Grout-injected or close-fit options

2. Steel-Reinforced Spiral Wound

Features:

Steel strip embedded within the profile

Higher load-bearing capacity

Suitable for large diameters and high-load conditions

3. PVC Spiral Wound

Uses pure PVC profiles:

Lightweight

Corrosion-resistant

High installation efficiency

4. Grouted Spiral Wound

Features:

Annular space formed between the new and old pipes

Fixed via grouting

Enhances overall structural strength

5. Close-Fit Spiral Wound

Features:

Fits tightly against the existing pipe

No grouting required

Faster installation

Suitable for pipes in relatively good condition

Typical Solutions

Pipeline Issue Recommended Solution

Pipe aging PVC Spiral Wound Lining

Extensive corrosion Steel Reinforced Spiral Wound

Large-diameter sewer pipes Structural Spiral Wound

Stormwater pipe rehabilitation Mechanical Spiral Wound

Pipe leakage Grouted Spiral Wound

Pipe cracks Spiral Wound Structural Lining

Sectional rehabilitation manhole-to-manhole Continuous Spiral Wound

Long-distance rehabilitation Traverse Winding Machine

High groundwater areas Grouted Spiral Wound System

Heavy traffic load areas Steel Reinforced PVC Liner